Tele for X-E1

I am very happy with my X-E1, I really feel at home with this camera, even if it has not got an optical viewfinder (that is another discussion).
I have left a system where I had lenses from wide angle to telezooms equiv. 100-400 (which was my main lens for photographing beach volleyball).
I am trying another world now. I have got two lenses so far, the 18mm and the 35mm. I like them both. I also want to get the 56mm.
However, when i travel to my favorite island in the north of Norway, I know I will grab in my bag for something longer (birds, you know). I would like something like the old-fashioned 135mm. Voigtländer has a 90mm. Can you people explain to an old guy like me what it will be like to use this lens on the X-E1?
I know there is a Fuji zoom coming up, but I just wondered anyway...

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Raymond
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